Quarterly report pursuant to Section 13 or 15(d)

Restructuring Expense (Details)

v3.7.0.1
Restructuring Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]          
Restructuring expense $ 0 $ 16 $ 6 $ 23  
Share-based compensation $ 27 41 59 58  
Restructuring expense [Member]          
Restructuring Cost and Reserve [Line Items]          
Share-based compensation   $ 16 $ 3 $ 22  
Accrued liabilities [Member]          
Restructuring Cost and Reserve [Line Items]          
Accrued restructuring expense         $ 6